EXAMINATION AND PRESERVATION MEDIA. 239 



Mercurial Liquids. 



{I give these as examination media only, not as permanent mounting media. 

 Media containing sublimate always end by malcing tissues granular.) 



412. Gilson's Fluid (Caknot's Biologie cellulaire, p. 94). 

 Alcohol of 60 per cent. . . .60 c.c. 



Water 30 „ 



Glycerin . . . . . 30 „ 



Acetic acid (15 parts of the glacial 



to 85 of water) . . . 2 „ 



Bichloride of mercury . . . 0'15 grm. 



4 13. Gagk's Albumen Fluid [Zei'. f. «-i.«s. Mih, 1886, 

 p. 223). 



White of egg . . . .15 c.c. 



Water 200 „ 



Corrosive sublimate . . . 0'5 grm. 



Salt ...... 4 grms. 



Mix, agitate, filter, and preserve in a cool place. Recom- 

 mended for the study of red blood-corpuscles and ciliated 

 cells. 



414. Pacini's Fluids {Journ. de Mi/c, iv, 1880; Juurn.Boy. Mic. Soc, 

 [N.S.] ii, 1882, p. 702, and early editions of this work). — Antiquated and 

 superfluous. They consist essentially of corrosive sublimate of from one 

 half to one third per cent, strength, with the addition of a little salt or 

 acetic acid. 



415. Goadby's Fluids {Micro. Diet., art. " Preservation," or early 

 editions of this work). — Quite unsuited for histological purposes. 



Other Fluids. 



416. Chloride and Acetate of Copper (Ripaet et Petit's fluid, 

 see § 90). 



417. Tannin (Caenoy, Biol. Cellulaire, p. 95). — Water 100 grms., 

 powdered tannin 0'40 grm., as an examination medium only. 



418. Wickersheikbe's Fluid (Zool. Aiiz., 1879, p. 670). — Worthless 

 for histological purposes. 



419. Medium of Faeeants (Beale, Hoiv to Worlc, etc., 

 p. 58). — Picked gum arable 4 ozs., water 4, glycerin 2, 



